topic Re: When I config netmask for a lan interface to 255.255.255.224, ifconfig report error. in Operating System - HP-UX

When I config netmask for a lan interface to 255.255.255.224, ifconfig report error.

稀里哗啦 — Mon, 09 Dec 2002 16:59:27 GMT

If I config netmask 255.255.255.0, every thing is OK.
My OS is hpux 11.00.
Pls help me.

Re: When I config netmask for a lan interface to 255.255.255.224, ifconfig report error.

Sridhar Bhaskarla — Mon, 09 Dec 2002 17:06:34 GMT

Hi,

Ask your system not to check for the validity of the subnetmask using "ndd".

ndd -get /dev/ip ip_check_subnet_addr 0

-Sri

Re: When I config netmask for a lan interface to 255.255.255.224, ifconfig report error.

Oleg Zieaev_1 — Mon, 09 Dec 2002 17:14:11 GMT

Your IP is most likely in the subnet0, which you can not use by defaul as it reserved so route to your network is possible. Use IP address after 32 (subnet1 ip=32: client IPs :33-62, broadcast 63).
Or switch the IP subnet check mentioned above to 0, so you can use subnet0.
(note: should be set, not get - just a typo).

Hope this helps,
0leg

Re: When I config netmask for a lan interface to 255.255.255.224, ifconfig report error.

Steven E. Protter — Tue, 10 Dec 2002 16:15:35 GMT

What IP address are you trying to use?

The subnet mask .224 limits you to 30 possible IP addresses.

The lowest is reserved as gateway, the highest is reserved as broadcast address.

You can't use that mask for all IP addresses.

The corrected check command above should help you figure it out.

Your network administrator should be able to help you out. He or she is probably the one that told you to use the subnet mask in the first place.

Steve